JP4124545B2 - Cutter assembly for plantation equipment - Google Patents

Description

[0001]
[Field of the Invention]
The present invention relates to a cutter assembly of a rotary vegetation cutting device driven by power.
[0002]
[Prior art]
2. Description of the Related Art A rotary grass cutting device that is attached to the tip of an arm of an earthmoving machine such as a power shovel includes a cutter assembly in which a cutter unit is coupled to a rotary shaft that is driven by power such as a hydraulic motor.
[0003]
[Problems to be solved by the invention]
The cutter assembly of this type of logging device is one in which a cutter unit having a cutting blade is coupled to a power rotary shaft and the vegetation is cut by rotating the cutter assembly. The position of the center of gravity is coupled to the rotation shaft, and the cutter assembly is assembled so that the gravity balance is uniform. For this reason, a strong rotational force could not be obtained, and it was not possible to cut hard things such as trees.
[0004]
Further, the conventional cutter unit has a disadvantage that the blade is horizontal and the blade hits the right angle with respect to the upright vegetation, so that the cut grass is easily entangled with the blade.
[0005]
Accordingly, a first object of the present invention is to provide a cutter assembly for a vegetation logging device that has improved logging efficiency by a strong inertia torque.
[0006]
The second object of the present invention is to provide the above cutter assembly in which the cut foliage is less likely to be tangled with the blade.
[0007]
[Means for Solving the Problems]
In order to achieve the first object, according to the present invention, there is provided a cutter assembly for a vegetation logging device in which a cutter unit having a cutting blade is coupled to a rotary shaft, and the rotary shaft is provided with an unbalanced gravity balance of the cutter unit. And an inertia torque is applied to the rotating cutter assembly by centrifugal force with an uneven gravity balance.
[0008]
As one means to make the gravity balance of the cutter unit uneven, by connecting multiple cutting blades to the cutter unit with bolts and nuts, and connecting one of the cutting blades with a nut heavier than the other cutting blades The cutter unit may have an uneven gravity balance.
[0009]
In order to achieve the second object described above, the cutter assembly of the grass cutting device according to the present invention preferably has a plurality of cutting blades radially fixed to a base member coupled to the rotary shaft, Is fixed in a downward inclined manner toward the direction of rotation of the cutter unit.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a partial cross-sectional view showing the overall structure of a rotary type grass cutting device. This grass cutting device 1 is a cutter in which a cutter unit 4 is coupled to a rotary shaft 3 that is rotated by a rotary drive means 2 such as a hydraulic motor. An assembly 5 is provided.
[0011]
The cutter assembly 5 of the felling apparatus according to the embodiment shown in the drawing is arranged in a pair on the left and right sides of the frame 7 connected to the shaft body 6 of the rotation driving means 2, and the rotation shaft 3 is pivoted on the frame 7. In addition to being attached, the shaft 6 of the rotation driving means 2 and the rotation transmission means 8 such as a belt and a chain installed on the rotation shaft 3 of the cutter assembly 5 are rotated. The frame 7 is rotatably connected to the rotating shaft body 6 of the rotation driving means 2 with a predetermined braking force. For this reason, the cutter assembly 5 is rotated by the rotation transmitting means 8, and when the rotational resistance of the cutter assembly 5 becomes larger than the braking resistance of the rotary shaft body 6, the frame 7 rotates with respect to the shaft body 6. Thus, it is configured to revolve around the rotating shaft body 6.
[0012]
In the felling device 1 of the embodiment of FIG. 1, the rotation driving means 2 and the rotating shaft body 6 are coupled to a support plate 10 having a cover 9 on the peripheral surface, and an arm of an earthwork machine is mounted on the upper surface of the support plate 10. 11a, a link 12b and other stays 12 are joined together, and the cutting device 1 lifted by the arm 11a, link 11b is gradually cut from the top so that it is covered from above the vegetation. Can be done. Further, the cut piece cut off can be sucked to the outside from the discharge port 13.
[0013]
As shown in FIGS. 2 to 4, the cutter unit 4 coupled to the rotating shaft 3 of the cutter assembly 5 is formed by fixing a plurality of cutting blades 15 around the base member 14, and mounting holes for the base member 14. Is coupled to the rotary shaft 3. Further, the base member 14 of the cutter unit 4 in the illustrated embodiment has a plurality of (in the figure, four) brackets 16 extending radially, and a cutting blade 15 is detachably fixed to the tip of the bracket 16. is there.
[0014]
The cutter assembly 5 of the present invention is coupled to the rotary shaft 3 with the gravity balance of the cutter unit 4 being non-uniform.
Although the conventional cutter assembly 5 is mounted with the gravity center position of the cutter unit 4 coupled to the rotary shaft 3 and the gravity balanced evenly, the present invention is designed so that the gravity balance of the cutter unit 4 becomes uneven. A strong torque is generated in the cutter assembly 5 by the rotational centrifugal force of the cutter unit 4 coupled to the rotary shaft 3 and having an uneven gravity balance.
[0015]
That is, the cutter assembly 5 of the present invention applies a large centrifugal force to the rotating cutter unit 4 by shifting the rotational fulcrum of the cutter unit 4 and the center of gravity, thereby applying a strong twisting inertia torque to the cutter assembly 5. Is generated.
[0016]
There are various methods for making the gravity balance of the cutter unit 4 uneven, that is, for making the rotational fulcrum of the cutter unit 4 different from the position of the center of gravity.
When the center of gravity is at the center point of the cutter unit 4, for example, as shown in FIGS. 2 and 3, the center A of the cutter unit 4 and the center B of the rotary shaft 3 are shifted so that the rotation fulcrum of the cutter unit 4 is in an eccentric position. If the center of the cutter unit 4 is a rotation fulcrum, the gravity balance is made uneven by increasing the weight of the cutter unit locally due to weight, difference in member weight, etc. Also good.
As shown in FIG. 4, when a plurality of cutting blades 15 are fixed around the base member 14 using the bolts 17 and the nuts 18, nuts 18 ′ heavier than others are used for the specific cutting blades 15. The balance may be uneven. In this case, the purpose of gravity unbalance can be achieved at low cost.
[0017]
When a plurality of cutting blades 15 are fixed radially around the base member 14, it is desirable that the cutting blades 15 are fixed in a downwardly inclined manner toward the rotation direction of the cutter unit 4 as shown in the figure. As shown in FIG. 1, the felling device 1 using the cutter assembly 5 of the present invention supports the upper stay 12 by the arm 11a and the link 11b of the earthmoving machine, and covers the felling device 1 from above the standing plant. Since the trees are gradually finely cut from above, as described above, the cutting blade 15 is inclined downward in the rotation direction to generate an upward air flow during high-speed rotation, and the finely cut vegetation moves upward. It is scattered and does not adhere to the cutting blade 15.
[0018]
The cutter unit 4 and the rotary shaft 3 may be directly coupled so as to always rotate integrally, but as shown in FIG. 5, the cutter unit 4 can be rotated through the mounting hole on the rotary shaft 3 to which the locking member 19 is fixed. And the base member 14 of the cutter unit 4 is held between the flange member 20 attached to the tip of the rotary shaft 3 and the locking member 19, and the cutter unit is formed by the pressing means 21 provided on the support surface of the flange member 20. The base unit 14 may be press-fitted and the cutter unit 4 and the rotary shaft 3 may be coupled so as to be integrally rotatable.
[0019]
According to this coupling means, the cutter unit 4 and the rotary shaft 3 rotate together to cut down the vegetation, and if excessive resistance is applied to the cutter unit 4, the locking member 19 and the flange member for the base member 14 of the cutter unit 4 The 20 pressure-engaging engagement surfaces slip and the excessive resistance of the cutter unit 4 is not transmitted to the rotary shaft 3.
On the other hand, when the excessive resistance disappears, the cutter unit 4 is restored to the rotational force by the press-contact engagement, and can be cut down. In this case, the cutter assembly 5 of the present invention has high cutting efficiency because inertia torque is increased by a strong centrifugal force.
[0020]
【effect】
In the present invention, the cutter assembly is formed by shifting the center of gravity and the rotation fulcrum of the cutter unit so that the balance of the center of gravity becomes non-uniform. Therefore, when the cutter assembly rotates at high speed, the cutter assembly is caused by the centrifugal force of the biased center of gravity. Inertia torque is strong. Therefore, the cutting power is strengthened, and hard vegetation can be cut efficiently.
[0021]
In particular, when multiple cutting blades are connected with bolts and nuts, the gravity balance of the cutter unit is uneven in the normal assembly process by connecting one of the cutting blades with a nut that is heavier than the other cutting blades. It is extremely reasonable.
[0022]
By tilting the cutting blade downwards in the direction of rotation, an upward swirling airflow is generated during the rotation, and the cut and chopped foliage is scattered by this airflow. Therefore, the work efficiency is remarkably improved because the cutting blade is not entangled.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing a partial longitudinal section of a plant cutting device using a cutter assembly of the present invention. FIG. 2 is a diagram showing a cutter assembly installation. FIG. 3 is a bottom view of a cutter assembly. Cutter assembly installation drawing according to the embodiment [FIG. 5] Cutter assembly installation drawing partially shown in cross section [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Grass cutting device 2 ... Rotation drive means 3 ... Rotating shaft 4 ... Cutter unit 5 ... Cutter assembly 6 ... Shaft body 7 ... Frame 8 ... Rotation transmission means 9 ... Cover 10 ... Support plate 11a ... Arm 11b ... Link 12 ... Stay 13 ... Discharge port 14 ... Base member 15 ... Cutting blade 16 ... Bracket 17 ... Bolts 18 and 18 '... Nut 19 ... Locking member 20 ... Flange member 21 ... Repression means

Claims (3)

In the cutter assembly for a planting device, which is formed by connecting a cutter unit having a cutting blade to a rotating shaft, a plurality of cutting blades are combined with bolts and nuts to form the cutter unit, and the cutting unit has a plurality of cutting blades. By connecting one of the cutting blades of the cutter unit with a nut that is heavier than the other cutting blades, the gravity balance of the cutter unit is configured unevenly, and the rotating cutter assembly is rotated by the centrifugal force of this uneven gravity balance. Cutter assembly for plant cutting equipment in which inertia torque acts on a solid body In a cutter assembly for a grass cutting device in which a cutter unit having a cutting blade is coupled to a rotary shaft, the center of the cutter unit is shifted from the center of the rotary shaft, and the rotation fulcrum of the cutter unit is provided at an eccentric position. Cutter assembly for cutting equipment in which inertial torque is applied to the rotating cutter assembly by the centrifugal force of uneven gravity balance of the unit In a cutter assembly for a cutting device with a cutting blade connected to a rotating shaft, the cutter unit is attached to the rotating shaft with the gravity balance of the cutter unit being uneven, and is rotated by the centrifugal force of the uneven gravity balance. The cutter unit is configured such that inertia torque acts on the cutter assembly, and the cutter unit is configured such that a plurality of cutting blades are radially fixed to a base member coupled to a rotating shaft, and each cutting blade rotates the cutter unit. grass tree felling device cutter assembly you characterized in that it is fixed to the downwardly inclined shape toward the direction of travel

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